62 tests are failing

[manuth]

As mentioned in issue #1244 I just tried to create a PR for fixing said issue.
Sadly in the current state (without touching anything but just running npm install and npm test) there are 62 unit-tests failing.

That way it's a bit hard for me to tell whether changes made to the project "would" or "would not" cause any harm to the project.

[ljharb]

What OS are you using?

[manuth]

I tried it on Windows 10 (Build 1909) and Docker Images (node:14 and node:10).

That said, I couldn't even build the project using Windows or node:14.

[manuth]

Alright I managed it to get it done using WSL with node v12 installed.
Looks like git for windows doesn't clone symbolic links and instead creates files containing the file-path.

Now all tests pass except for the case sensitivity ones as WSL neither is fully case sensitive nor fully case insensitive (directories are case sensitive while files aren't).

I'll create a separate PR for this.